Cold weather, Robert Redford, and an excuse to turn off our phones for at least six hours a day. These are just a few of the attractions awaiting visitors to the Sundance Film Festival, which kicks off in Park City, Utah in two weeks. From the looks of the 2012 program, we should expect an array of precocious documentaries, trippy animated films, and bourgeois coming-of-age maneuvers (for some reason, they’ve decided to re-screen “Reality Bites”). It is, in short, an uneven mix of pyrite and gold.